/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 06:47:46,307 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 06:47:46,308 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 06:47:46,327 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-02 06:47:46,333 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 06:47:46,333 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 06:47:46,334 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 06:47:46,335 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 06:47:46,335 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 06:47:46,336 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 06:47:46,337 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 06:47:46,338 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 06:47:46,339 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 06:47:46,343 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 06:47:46,343 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 06:47:46,344 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 06:47:46,346 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 06:47:46,350 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 06:47:46,351 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 06:47:46,351 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 06:47:46,353 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-02 06:47:46,375 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 06:47:46,375 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 06:47:46,375 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 06:47:46,375 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 06:47:46,376 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 06:47:46,376 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 06:47:46,377 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 06:47:46,377 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 06:47:46,377 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 06:47:46,377 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 06:47:46,378 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 06:47:46,378 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 06:47:46,378 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 06:47:46,378 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 06:47:46,378 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 06:47:46,378 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 06:47:46,378 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 06:47:46,378 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 06:47:46,378 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 06:47:46,378 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 06:47:46,379 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 06:47:46,379 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 06:47:46,379 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 06:47:46,379 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 06:47:46,379 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 06:47:46,379 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 06:47:46,379 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 06:47:46,380 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 06:47:46,380 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 06:47:46,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 06:47:46,380 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 06:47:46,380 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 06:47:46,380 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 06:47:46,380 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 06:47:46,381 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 06:47:46,381 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 06:47:46,557 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 06:47:46,577 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 06:47:46,579 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 06:47:46,580 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 06:47:46,580 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 06:47:46,581 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-04-02 06:47:47,444 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 06:47:47,655 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 06:47:47,655 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-04-02 06:47:47,663 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/020d30239/3adbea596b464cd287c84a7d4943392e/FLAG2c05ba525 [2023-04-02 06:47:47,672 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/020d30239/3adbea596b464cd287c84a7d4943392e [2023-04-02 06:47:47,674 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 06:47:47,675 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 06:47:47,676 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 06:47:47,676 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 06:47:47,678 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 06:47:47,678 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 06:47:47" (1/1) ... [2023-04-02 06:47:47,679 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7683e17f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:47:47, skipping insertion in model container [2023-04-02 06:47:47,679 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 06:47:47" (1/1) ... [2023-04-02 06:47:47,684 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 06:47:47,720 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 06:47:47,844 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7638,7651] [2023-04-02 06:47:47,874 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 06:47:47,884 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 06:47:47,929 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7638,7651] [2023-04-02 06:47:47,946 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 06:47:47,959 INFO L208 MainTranslator]: Completed translation [2023-04-02 06:47:47,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:47:47 WrapperNode [2023-04-02 06:47:47,959 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 06:47:47,961 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 06:47:47,961 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 06:47:47,961 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 06:47:47,969 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:47:47" (1/1) ... [2023-04-02 06:47:47,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:47:47" (1/1) ... [2023-04-02 06:47:47,989 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:47:47" (1/1) ... [2023-04-02 06:47:47,989 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:47:47" (1/1) ... [2023-04-02 06:47:47,999 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:47:47" (1/1) ... [2023-04-02 06:47:48,003 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:47:47" (1/1) ... [2023-04-02 06:47:48,005 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:47:47" (1/1) ... [2023-04-02 06:47:48,007 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:47:47" (1/1) ... [2023-04-02 06:47:48,010 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 06:47:48,011 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 06:47:48,011 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 06:47:48,011 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 06:47:48,011 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:47:47" (1/1) ... [2023-04-02 06:47:48,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 06:47:48,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 06:47:48,042 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 06:47:48,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 06:47:48,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 06:47:48,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 06:47:48,071 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 06:47:48,072 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 06:47:48,072 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 06:47:48,072 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 06:47:48,072 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 06:47:48,072 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 06:47:48,072 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 06:47:48,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-02 06:47:48,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-02 06:47:48,072 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-02 06:47:48,073 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 06:47:48,073 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-02 06:47:48,073 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-02 06:47:48,073 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-02 06:47:48,073 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-02 06:47:48,073 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-02 06:47:48,074 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-02 06:47:48,074 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-02 06:47:48,074 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 06:47:48,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 06:47:48,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 06:47:48,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 06:47:48,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 06:47:48,075 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 06:47:48,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 06:47:48,194 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 06:47:48,197 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 06:47:48,608 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 06:47:48,614 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 06:47:48,614 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-02 06:47:48,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 06:47:48 BoogieIcfgContainer [2023-04-02 06:47:48,615 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 06:47:48,617 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 06:47:48,617 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 06:47:48,619 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 06:47:48,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 06:47:47" (1/3) ... [2023-04-02 06:47:48,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d0ee19a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 06:47:48, skipping insertion in model container [2023-04-02 06:47:48,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:47:47" (2/3) ... [2023-04-02 06:47:48,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d0ee19a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 06:47:48, skipping insertion in model container [2023-04-02 06:47:48,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 06:47:48" (3/3) ... [2023-04-02 06:47:48,623 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-04-02 06:47:48,636 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 06:47:48,636 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 06:47:48,671 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 06:47:48,675 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@69bddad3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=<UNSUPPORTED>, UseSemiCommutativity=<UNSUPPORTED>, Solver=<NOT_USED>, SolverTimeout=<NOT_USED>] [2023-04-02 06:47:48,675 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 06:47:48,679 INFO L276 IsEmpty]: Start isEmpty. Operand has 154 states, 142 states have (on average 1.7464788732394365) internal successors, (248), 149 states have internal predecessors, (248), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 06:47:48,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-02 06:47:48,689 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:47:48,689 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:47:48,689 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:47:48,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:47:48,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1629246141, now seen corresponding path program 1 times [2023-04-02 06:47:48,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:47:48,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119359579] [2023-04-02 06:47:48,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:47:48,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:47:48,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:47:49,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:47:49,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:47:49,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:47:49,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:47:49,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119359579] [2023-04-02 06:47:49,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119359579] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:47:49,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:47:49,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:47:49,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136397345] [2023-04-02 06:47:49,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:47:49,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:47:49,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:47:49,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:47:49,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:47:49,317 INFO L87 Difference]: Start difference. First operand has 154 states, 142 states have (on average 1.7464788732394365) internal successors, (248), 149 states have internal predecessors, (248), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:47:49,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:47:49,938 INFO L93 Difference]: Finished difference Result 340 states and 542 transitions. [2023-04-02 06:47:49,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:47:49,940 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2023-04-02 06:47:49,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:47:49,951 INFO L225 Difference]: With dead ends: 340 [2023-04-02 06:47:49,951 INFO L226 Difference]: Without dead ends: 222 [2023-04-02 06:47:49,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:47:49,959 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 148 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:47:49,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 450 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:47:49,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2023-04-02 06:47:49,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 220. [2023-04-02 06:47:49,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 216 states have (on average 1.537037037037037) internal successors, (332), 216 states have internal predecessors, (332), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:47:49,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 335 transitions. [2023-04-02 06:47:49,995 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 335 transitions. Word has length 60 [2023-04-02 06:47:49,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:47:49,996 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 335 transitions. [2023-04-02 06:47:49,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:47:49,996 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 335 transitions. [2023-04-02 06:47:49,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-02 06:47:49,998 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:47:49,998 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:47:49,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 06:47:49,998 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:47:49,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:47:49,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1972830722, now seen corresponding path program 1 times [2023-04-02 06:47:49,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:47:49,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424230983] [2023-04-02 06:47:49,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:47:49,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:47:50,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:47:50,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:47:50,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:47:50,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:47:50,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:47:50,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424230983] [2023-04-02 06:47:50,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424230983] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:47:50,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:47:50,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:47:50,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486447963] [2023-04-02 06:47:50,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:47:50,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:47:50,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:47:50,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:47:50,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:47:50,268 INFO L87 Difference]: Start difference. First operand 220 states and 335 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:47:50,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:47:50,779 INFO L93 Difference]: Finished difference Result 534 states and 831 transitions. [2023-04-02 06:47:50,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:47:50,780 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2023-04-02 06:47:50,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:47:50,782 INFO L225 Difference]: With dead ends: 534 [2023-04-02 06:47:50,782 INFO L226 Difference]: Without dead ends: 369 [2023-04-02 06:47:50,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:47:50,784 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 120 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:47:50,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 397 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:47:50,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2023-04-02 06:47:50,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 367. [2023-04-02 06:47:50,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 363 states have (on average 1.5509641873278237) internal successors, (563), 363 states have internal predecessors, (563), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:47:50,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 566 transitions. [2023-04-02 06:47:50,805 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 566 transitions. Word has length 62 [2023-04-02 06:47:50,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:47:50,805 INFO L495 AbstractCegarLoop]: Abstraction has 367 states and 566 transitions. [2023-04-02 06:47:50,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:47:50,805 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 566 transitions. [2023-04-02 06:47:50,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-04-02 06:47:50,807 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:47:50,807 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:47:50,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 06:47:50,807 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:47:50,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:47:50,808 INFO L85 PathProgramCache]: Analyzing trace with hash -677535361, now seen corresponding path program 1 times [2023-04-02 06:47:50,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:47:50,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669007930] [2023-04-02 06:47:50,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:47:50,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:47:50,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:47:50,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:47:51,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:47:51,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:47:51,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:47:51,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669007930] [2023-04-02 06:47:51,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669007930] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:47:51,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:47:51,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:47:51,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205489959] [2023-04-02 06:47:51,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:47:51,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:47:51,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:47:51,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:47:51,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:47:51,016 INFO L87 Difference]: Start difference. First operand 367 states and 566 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:47:51,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:47:51,454 INFO L93 Difference]: Finished difference Result 959 states and 1496 transitions. [2023-04-02 06:47:51,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:47:51,454 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2023-04-02 06:47:51,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:47:51,456 INFO L225 Difference]: With dead ends: 959 [2023-04-02 06:47:51,456 INFO L226 Difference]: Without dead ends: 647 [2023-04-02 06:47:51,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:47:51,458 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 114 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:47:51,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 398 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:47:51,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2023-04-02 06:47:51,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 645. [2023-04-02 06:47:51,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 641 states have (on average 1.5522620904836193) internal successors, (995), 641 states have internal predecessors, (995), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:47:51,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 998 transitions. [2023-04-02 06:47:51,479 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 998 transitions. Word has length 64 [2023-04-02 06:47:51,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:47:51,480 INFO L495 AbstractCegarLoop]: Abstraction has 645 states and 998 transitions. [2023-04-02 06:47:51,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:47:51,480 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 998 transitions. [2023-04-02 06:47:51,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-04-02 06:47:51,481 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:47:51,482 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:47:51,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 06:47:51,482 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:47:51,482 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:47:51,482 INFO L85 PathProgramCache]: Analyzing trace with hash -896705344, now seen corresponding path program 1 times [2023-04-02 06:47:51,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:47:51,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203253426] [2023-04-02 06:47:51,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:47:51,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:47:51,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:47:51,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:47:51,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:47:51,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:47:51,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:47:51,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203253426] [2023-04-02 06:47:51,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203253426] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:47:51,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:47:51,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:47:51,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362233459] [2023-04-02 06:47:51,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:47:51,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:47:51,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:47:51,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:47:51,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:47:51,714 INFO L87 Difference]: Start difference. First operand 645 states and 998 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:47:52,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:47:52,289 INFO L93 Difference]: Finished difference Result 2783 states and 4388 transitions. [2023-04-02 06:47:52,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 06:47:52,290 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2023-04-02 06:47:52,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:47:52,296 INFO L225 Difference]: With dead ends: 2783 [2023-04-02 06:47:52,296 INFO L226 Difference]: Without dead ends: 2183 [2023-04-02 06:47:52,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-04-02 06:47:52,299 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 852 mSDsluCounter, 1295 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 1504 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:47:52,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [852 Valid, 1504 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:47:52,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2183 states. [2023-04-02 06:47:52,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2183 to 1140. [2023-04-02 06:47:52,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1136 states have (on average 1.5704225352112675) internal successors, (1784), 1136 states have internal predecessors, (1784), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:47:52,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1787 transitions. [2023-04-02 06:47:52,350 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1787 transitions. Word has length 66 [2023-04-02 06:47:52,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:47:52,350 INFO L495 AbstractCegarLoop]: Abstraction has 1140 states and 1787 transitions. [2023-04-02 06:47:52,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:47:52,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1787 transitions. [2023-04-02 06:47:52,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-02 06:47:52,352 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:47:52,352 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:47:52,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 06:47:52,352 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:47:52,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:47:52,352 INFO L85 PathProgramCache]: Analyzing trace with hash -2089672354, now seen corresponding path program 1 times [2023-04-02 06:47:52,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:47:52,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423051727] [2023-04-02 06:47:52,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:47:52,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:47:52,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:47:52,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:47:52,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:47:52,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:47:52,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:47:52,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423051727] [2023-04-02 06:47:52,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423051727] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:47:52,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:47:52,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 06:47:52,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637778923] [2023-04-02 06:47:52,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:47:52,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 06:47:52,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:47:52,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 06:47:52,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:47:52,577 INFO L87 Difference]: Start difference. First operand 1140 states and 1787 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:47:53,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:47:53,100 INFO L93 Difference]: Finished difference Result 3323 states and 5253 transitions. [2023-04-02 06:47:53,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 06:47:53,101 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2023-04-02 06:47:53,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:47:53,108 INFO L225 Difference]: With dead ends: 3323 [2023-04-02 06:47:53,108 INFO L226 Difference]: Without dead ends: 2238 [2023-04-02 06:47:53,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:47:53,110 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 409 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:47:53,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 636 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:47:53,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2238 states. [2023-04-02 06:47:53,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2238 to 1677. [2023-04-02 06:47:53,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1677 states, 1673 states have (on average 1.57083084279737) internal successors, (2628), 1673 states have internal predecessors, (2628), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:47:53,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 2631 transitions. [2023-04-02 06:47:53,206 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 2631 transitions. Word has length 67 [2023-04-02 06:47:53,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:47:53,207 INFO L495 AbstractCegarLoop]: Abstraction has 1677 states and 2631 transitions. [2023-04-02 06:47:53,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:47:53,207 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 2631 transitions. [2023-04-02 06:47:53,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-02 06:47:53,209 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:47:53,209 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:47:53,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 06:47:53,211 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:47:53,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:47:53,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1016668998, now seen corresponding path program 1 times [2023-04-02 06:47:53,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:47:53,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842970048] [2023-04-02 06:47:53,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:47:53,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:47:53,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:47:53,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:47:53,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:47:53,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:47:53,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:47:53,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842970048] [2023-04-02 06:47:53,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842970048] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:47:53,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:47:53,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:47:53,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485675305] [2023-04-02 06:47:53,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:47:53,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:47:53,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:47:53,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:47:53,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:47:53,400 INFO L87 Difference]: Start difference. First operand 1677 states and 2631 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:47:54,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:47:54,067 INFO L93 Difference]: Finished difference Result 3672 states and 5771 transitions. [2023-04-02 06:47:54,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:47:54,068 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2023-04-02 06:47:54,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:47:54,075 INFO L225 Difference]: With dead ends: 3672 [2023-04-02 06:47:54,075 INFO L226 Difference]: Without dead ends: 2514 [2023-04-02 06:47:54,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:47:54,078 INFO L413 NwaCegarLoop]: 307 mSDtfsCounter, 127 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:47:54,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 484 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:47:54,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2023-04-02 06:47:54,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 2512. [2023-04-02 06:47:54,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2512 states, 2508 states have (on average 1.5598086124401913) internal successors, (3912), 2508 states have internal predecessors, (3912), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:47:54,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2512 states to 2512 states and 3915 transitions. [2023-04-02 06:47:54,200 INFO L78 Accepts]: Start accepts. Automaton has 2512 states and 3915 transitions. Word has length 68 [2023-04-02 06:47:54,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:47:54,200 INFO L495 AbstractCegarLoop]: Abstraction has 2512 states and 3915 transitions. [2023-04-02 06:47:54,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:47:54,200 INFO L276 IsEmpty]: Start isEmpty. Operand 2512 states and 3915 transitions. [2023-04-02 06:47:54,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-02 06:47:54,201 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:47:54,202 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:47:54,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 06:47:54,202 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:47:54,202 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:47:54,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1954715816, now seen corresponding path program 1 times [2023-04-02 06:47:54,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:47:54,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642164215] [2023-04-02 06:47:54,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:47:54,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:47:54,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:47:54,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:47:54,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:47:54,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:47:54,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:47:54,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642164215] [2023-04-02 06:47:54,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642164215] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:47:54,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:47:54,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:47:54,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132199106] [2023-04-02 06:47:54,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:47:54,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:47:54,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:47:54,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:47:54,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:47:54,410 INFO L87 Difference]: Start difference. First operand 2512 states and 3915 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:47:55,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:47:55,110 INFO L93 Difference]: Finished difference Result 4872 states and 7598 transitions. [2023-04-02 06:47:55,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:47:55,110 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2023-04-02 06:47:55,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:47:55,120 INFO L225 Difference]: With dead ends: 4872 [2023-04-02 06:47:55,120 INFO L226 Difference]: Without dead ends: 3480 [2023-04-02 06:47:55,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:47:55,125 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 121 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:47:55,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 466 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:47:55,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3480 states. [2023-04-02 06:47:55,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3480 to 3478. [2023-04-02 06:47:55,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3478 states, 3474 states have (on average 1.5469199769717905) internal successors, (5374), 3474 states have internal predecessors, (5374), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:47:55,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3478 states to 3478 states and 5377 transitions. [2023-04-02 06:47:55,298 INFO L78 Accepts]: Start accepts. Automaton has 3478 states and 5377 transitions. Word has length 68 [2023-04-02 06:47:55,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:47:55,298 INFO L495 AbstractCegarLoop]: Abstraction has 3478 states and 5377 transitions. [2023-04-02 06:47:55,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:47:55,299 INFO L276 IsEmpty]: Start isEmpty. Operand 3478 states and 5377 transitions. [2023-04-02 06:47:55,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-02 06:47:55,301 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:47:55,302 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:47:55,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 06:47:55,302 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:47:55,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:47:55,302 INFO L85 PathProgramCache]: Analyzing trace with hash -252170634, now seen corresponding path program 1 times [2023-04-02 06:47:55,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:47:55,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679816670] [2023-04-02 06:47:55,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:47:55,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:47:55,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:47:55,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:47:55,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:47:55,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:47:55,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:47:55,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679816670] [2023-04-02 06:47:55,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679816670] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:47:55,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:47:55,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:47:55,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971819121] [2023-04-02 06:47:55,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:47:55,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:47:55,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:47:55,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:47:55,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:47:55,536 INFO L87 Difference]: Start difference. First operand 3478 states and 5377 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:47:56,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:47:56,269 INFO L93 Difference]: Finished difference Result 6648 states and 10278 transitions. [2023-04-02 06:47:56,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:47:56,269 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2023-04-02 06:47:56,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:47:56,283 INFO L225 Difference]: With dead ends: 6648 [2023-04-02 06:47:56,284 INFO L226 Difference]: Without dead ends: 4741 [2023-04-02 06:47:56,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:47:56,288 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 115 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:47:56,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 443 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:47:56,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4741 states. [2023-04-02 06:47:56,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4741 to 4739. [2023-04-02 06:47:56,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4739 states, 4735 states have (on average 1.5311510031678985) internal successors, (7250), 4735 states have internal predecessors, (7250), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:47:56,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4739 states to 4739 states and 7253 transitions. [2023-04-02 06:47:56,545 INFO L78 Accepts]: Start accepts. Automaton has 4739 states and 7253 transitions. Word has length 68 [2023-04-02 06:47:56,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:47:56,546 INFO L495 AbstractCegarLoop]: Abstraction has 4739 states and 7253 transitions. [2023-04-02 06:47:56,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:47:56,546 INFO L276 IsEmpty]: Start isEmpty. Operand 4739 states and 7253 transitions. [2023-04-02 06:47:56,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-02 06:47:56,548 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:47:56,548 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:47:56,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-02 06:47:56,548 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:47:56,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:47:56,549 INFO L85 PathProgramCache]: Analyzing trace with hash -959976974, now seen corresponding path program 1 times [2023-04-02 06:47:56,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:47:56,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213743249] [2023-04-02 06:47:56,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:47:56,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:47:56,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:47:56,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:47:56,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:47:56,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:47:56,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:47:56,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213743249] [2023-04-02 06:47:56,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213743249] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:47:56,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:47:56,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:47:56,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808863284] [2023-04-02 06:47:56,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:47:56,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:47:56,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:47:56,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:47:56,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:47:56,902 INFO L87 Difference]: Start difference. First operand 4739 states and 7253 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 5 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:47:57,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:47:57,777 INFO L93 Difference]: Finished difference Result 7901 states and 12000 transitions. [2023-04-02 06:47:57,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:47:57,777 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 5 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2023-04-02 06:47:57,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:47:57,812 INFO L225 Difference]: With dead ends: 7901 [2023-04-02 06:47:57,812 INFO L226 Difference]: Without dead ends: 7899 [2023-04-02 06:47:57,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:47:57,817 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 260 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:47:57,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 1014 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:47:57,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7899 states. [2023-04-02 06:47:58,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7899 to 4843. [2023-04-02 06:47:58,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4843 states, 4839 states have (on average 1.5141558173176277) internal successors, (7327), 4839 states have internal predecessors, (7327), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:47:58,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4843 states to 4843 states and 7330 transitions. [2023-04-02 06:47:58,122 INFO L78 Accepts]: Start accepts. Automaton has 4843 states and 7330 transitions. Word has length 75 [2023-04-02 06:47:58,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:47:58,122 INFO L495 AbstractCegarLoop]: Abstraction has 4843 states and 7330 transitions. [2023-04-02 06:47:58,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 5 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:47:58,123 INFO L276 IsEmpty]: Start isEmpty. Operand 4843 states and 7330 transitions. [2023-04-02 06:47:58,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-04-02 06:47:58,124 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:47:58,124 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:47:58,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-02 06:47:58,124 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:47:58,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:47:58,124 INFO L85 PathProgramCache]: Analyzing trace with hash 533898027, now seen corresponding path program 1 times [2023-04-02 06:47:58,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:47:58,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624256260] [2023-04-02 06:47:58,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:47:58,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:47:58,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:47:58,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:47:58,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:47:58,383 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 06:47:58,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:47:58,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624256260] [2023-04-02 06:47:58,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624256260] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:47:58,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:47:58,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:47:58,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037426246] [2023-04-02 06:47:58,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:47:58,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:47:58,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:47:58,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:47:58,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:47:58,384 INFO L87 Difference]: Start difference. First operand 4843 states and 7330 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 5 states have internal predecessors, (95), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:47:59,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:47:59,719 INFO L93 Difference]: Finished difference Result 13059 states and 19794 transitions. [2023-04-02 06:47:59,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:47:59,720 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 5 states have internal predecessors, (95), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2023-04-02 06:47:59,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:47:59,745 INFO L225 Difference]: With dead ends: 13059 [2023-04-02 06:47:59,745 INFO L226 Difference]: Without dead ends: 11041 [2023-04-02 06:47:59,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:47:59,755 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 509 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:47:59,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [509 Valid, 1056 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:47:59,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11041 states. [2023-04-02 06:48:00,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11041 to 7919. [2023-04-02 06:48:00,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7919 states, 7915 states have (on average 1.5096651926721416) internal successors, (11949), 7915 states have internal predecessors, (11949), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:00,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7919 states to 7919 states and 11952 transitions. [2023-04-02 06:48:00,312 INFO L78 Accepts]: Start accepts. Automaton has 7919 states and 11952 transitions. Word has length 99 [2023-04-02 06:48:00,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:48:00,312 INFO L495 AbstractCegarLoop]: Abstraction has 7919 states and 11952 transitions. [2023-04-02 06:48:00,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 5 states have internal predecessors, (95), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:00,312 INFO L276 IsEmpty]: Start isEmpty. Operand 7919 states and 11952 transitions. [2023-04-02 06:48:00,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-04-02 06:48:00,314 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:48:00,314 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:48:00,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-02 06:48:00,314 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:48:00,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:48:00,314 INFO L85 PathProgramCache]: Analyzing trace with hash -404148791, now seen corresponding path program 1 times [2023-04-02 06:48:00,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:48:00,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299513327] [2023-04-02 06:48:00,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:48:00,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:48:00,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:00,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:48:00,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:00,568 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 06:48:00,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:48:00,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299513327] [2023-04-02 06:48:00,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299513327] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:48:00,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:48:00,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:48:00,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117272912] [2023-04-02 06:48:00,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:48:00,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:48:00,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:48:00,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:48:00,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:48:00,570 INFO L87 Difference]: Start difference. First operand 7919 states and 11952 transitions. Second operand has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 5 states have internal predecessors, (89), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:02,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:48:02,123 INFO L93 Difference]: Finished difference Result 15786 states and 23907 transitions. [2023-04-02 06:48:02,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:48:02,123 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 5 states have internal predecessors, (89), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2023-04-02 06:48:02,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:48:02,145 INFO L225 Difference]: With dead ends: 15786 [2023-04-02 06:48:02,146 INFO L226 Difference]: Without dead ends: 12562 [2023-04-02 06:48:02,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:48:02,154 INFO L413 NwaCegarLoop]: 344 mSDtfsCounter, 515 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 1011 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:48:02,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 1011 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:48:02,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12562 states. [2023-04-02 06:48:02,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12562 to 11185. [2023-04-02 06:48:02,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11185 states, 11181 states have (on average 1.5092567748859673) internal successors, (16875), 11181 states have internal predecessors, (16875), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:02,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11185 states to 11185 states and 16878 transitions. [2023-04-02 06:48:02,962 INFO L78 Accepts]: Start accepts. Automaton has 11185 states and 16878 transitions. Word has length 99 [2023-04-02 06:48:02,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:48:02,962 INFO L495 AbstractCegarLoop]: Abstraction has 11185 states and 16878 transitions. [2023-04-02 06:48:02,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 5 states have internal predecessors, (89), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:02,963 INFO L276 IsEmpty]: Start isEmpty. Operand 11185 states and 16878 transitions. [2023-04-02 06:48:02,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-04-02 06:48:02,964 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:48:02,964 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:48:02,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-02 06:48:02,964 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:48:02,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:48:02,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1298396391, now seen corresponding path program 1 times [2023-04-02 06:48:02,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:48:02,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963131817] [2023-04-02 06:48:02,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:48:02,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:48:02,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:03,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:48:03,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:03,210 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 06:48:03,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:48:03,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963131817] [2023-04-02 06:48:03,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963131817] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:48:03,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:48:03,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:48:03,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163576074] [2023-04-02 06:48:03,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:48:03,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:48:03,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:48:03,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:48:03,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:48:03,212 INFO L87 Difference]: Start difference. First operand 11185 states and 16878 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 5 states have internal predecessors, (83), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:04,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:48:04,708 INFO L93 Difference]: Finished difference Result 17546 states and 26546 transitions. [2023-04-02 06:48:04,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:48:04,708 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 5 states have internal predecessors, (83), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2023-04-02 06:48:04,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:48:04,738 INFO L225 Difference]: With dead ends: 17546 [2023-04-02 06:48:04,738 INFO L226 Difference]: Without dead ends: 14322 [2023-04-02 06:48:04,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:48:04,747 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 524 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 1034 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:48:04,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [524 Valid, 1034 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:48:04,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14322 states. [2023-04-02 06:48:05,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14322 to 13443. [2023-04-02 06:48:05,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13443 states, 13439 states have (on average 1.5088176203586576) internal successors, (20277), 13439 states have internal predecessors, (20277), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:05,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13443 states to 13443 states and 20280 transitions. [2023-04-02 06:48:05,872 INFO L78 Accepts]: Start accepts. Automaton has 13443 states and 20280 transitions. Word has length 99 [2023-04-02 06:48:05,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:48:05,872 INFO L495 AbstractCegarLoop]: Abstraction has 13443 states and 20280 transitions. [2023-04-02 06:48:05,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 5 states have internal predecessors, (83), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:05,872 INFO L276 IsEmpty]: Start isEmpty. Operand 13443 states and 20280 transitions. [2023-04-02 06:48:05,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-04-02 06:48:05,874 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:48:05,874 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:48:05,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-02 06:48:05,874 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:48:05,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:48:05,874 INFO L85 PathProgramCache]: Analyzing trace with hash -630504542, now seen corresponding path program 1 times [2023-04-02 06:48:05,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:48:05,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529985016] [2023-04-02 06:48:05,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:48:05,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:48:05,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:06,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:48:06,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:06,058 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 06:48:06,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:48:06,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529985016] [2023-04-02 06:48:06,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529985016] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:48:06,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:48:06,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:48:06,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61255539] [2023-04-02 06:48:06,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:48:06,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:48:06,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:48:06,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:48:06,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:48:06,060 INFO L87 Difference]: Start difference. First operand 13443 states and 20280 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 3 states have internal predecessors, (96), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:07,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:48:07,878 INFO L93 Difference]: Finished difference Result 29035 states and 43958 transitions. [2023-04-02 06:48:07,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:48:07,879 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 3 states have internal predecessors, (96), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2023-04-02 06:48:07,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:48:07,915 INFO L225 Difference]: With dead ends: 29035 [2023-04-02 06:48:07,915 INFO L226 Difference]: Without dead ends: 21593 [2023-04-02 06:48:07,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:48:07,931 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 105 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:48:07,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 380 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:48:07,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21593 states. [2023-04-02 06:48:09,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21593 to 21541. [2023-04-02 06:48:09,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21541 states, 21537 states have (on average 1.5091238334029808) internal successors, (32502), 21537 states have internal predecessors, (32502), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:09,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21541 states to 21541 states and 32505 transitions. [2023-04-02 06:48:09,755 INFO L78 Accepts]: Start accepts. Automaton has 21541 states and 32505 transitions. Word has length 100 [2023-04-02 06:48:09,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:48:09,756 INFO L495 AbstractCegarLoop]: Abstraction has 21541 states and 32505 transitions. [2023-04-02 06:48:09,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 3 states have internal predecessors, (96), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:09,756 INFO L276 IsEmpty]: Start isEmpty. Operand 21541 states and 32505 transitions. [2023-04-02 06:48:09,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-04-02 06:48:09,758 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:48:09,758 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:48:09,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-02 06:48:09,758 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:48:09,758 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:48:09,758 INFO L85 PathProgramCache]: Analyzing trace with hash -690640813, now seen corresponding path program 1 times [2023-04-02 06:48:09,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:48:09,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829730419] [2023-04-02 06:48:09,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:48:09,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:48:09,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:09,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:48:09,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:09,977 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 06:48:09,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:48:09,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829730419] [2023-04-02 06:48:09,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829730419] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:48:09,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:48:09,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 06:48:09,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138876941] [2023-04-02 06:48:09,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:48:09,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 06:48:09,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:48:09,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 06:48:09,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:48:09,979 INFO L87 Difference]: Start difference. First operand 21541 states and 32505 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:12,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:48:12,405 INFO L93 Difference]: Finished difference Result 36531 states and 55337 transitions. [2023-04-02 06:48:12,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 06:48:12,406 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2023-04-02 06:48:12,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:48:12,458 INFO L225 Difference]: With dead ends: 36531 [2023-04-02 06:48:12,458 INFO L226 Difference]: Without dead ends: 28962 [2023-04-02 06:48:12,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:48:12,475 INFO L413 NwaCegarLoop]: 340 mSDtfsCounter, 235 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:48:12,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 678 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:48:12,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28962 states. [2023-04-02 06:48:14,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28962 to 27253. [2023-04-02 06:48:14,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27253 states, 27249 states have (on average 1.5082021358581967) internal successors, (41097), 27249 states have internal predecessors, (41097), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:14,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27253 states to 27253 states and 41100 transitions. [2023-04-02 06:48:14,701 INFO L78 Accepts]: Start accepts. Automaton has 27253 states and 41100 transitions. Word has length 100 [2023-04-02 06:48:14,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:48:14,703 INFO L495 AbstractCegarLoop]: Abstraction has 27253 states and 41100 transitions. [2023-04-02 06:48:14,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:14,703 INFO L276 IsEmpty]: Start isEmpty. Operand 27253 states and 41100 transitions. [2023-04-02 06:48:14,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-04-02 06:48:14,710 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:48:14,710 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:48:14,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-02 06:48:14,710 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:48:14,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:48:14,711 INFO L85 PathProgramCache]: Analyzing trace with hash 175201171, now seen corresponding path program 1 times [2023-04-02 06:48:14,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:48:14,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395445787] [2023-04-02 06:48:14,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:48:14,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:48:14,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:14,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:48:14,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:14,907 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:48:14,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:48:14,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395445787] [2023-04-02 06:48:14,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395445787] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:48:14,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:48:14,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:48:14,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249275939] [2023-04-02 06:48:14,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:48:14,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:48:14,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:48:14,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:48:14,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:48:14,909 INFO L87 Difference]: Start difference. First operand 27253 states and 41100 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:19,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:48:19,367 INFO L93 Difference]: Finished difference Result 79853 states and 120177 transitions. [2023-04-02 06:48:19,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:48:19,368 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2023-04-02 06:48:19,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:48:19,468 INFO L225 Difference]: With dead ends: 79853 [2023-04-02 06:48:19,469 INFO L226 Difference]: Without dead ends: 52689 [2023-04-02 06:48:19,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:48:19,509 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 160 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:48:19,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 513 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:48:19,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52689 states. [2023-04-02 06:48:23,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52689 to 52687. [2023-04-02 06:48:23,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52687 states, 52683 states have (on average 1.4928534821479416) internal successors, (78648), 52683 states have internal predecessors, (78648), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:24,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52687 states to 52687 states and 78651 transitions. [2023-04-02 06:48:24,084 INFO L78 Accepts]: Start accepts. Automaton has 52687 states and 78651 transitions. Word has length 101 [2023-04-02 06:48:24,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:48:24,084 INFO L495 AbstractCegarLoop]: Abstraction has 52687 states and 78651 transitions. [2023-04-02 06:48:24,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:24,085 INFO L276 IsEmpty]: Start isEmpty. Operand 52687 states and 78651 transitions. [2023-04-02 06:48:24,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-04-02 06:48:24,088 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:48:24,088 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:48:24,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-02 06:48:24,088 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:48:24,088 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:48:24,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1534411005, now seen corresponding path program 1 times [2023-04-02 06:48:24,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:48:24,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889976235] [2023-04-02 06:48:24,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:48:24,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:48:24,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:24,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:48:24,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:24,314 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:48:24,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:48:24,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889976235] [2023-04-02 06:48:24,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889976235] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:48:24,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:48:24,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:48:24,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813057846] [2023-04-02 06:48:24,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:48:24,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:48:24,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:48:24,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:48:24,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:48:24,315 INFO L87 Difference]: Start difference. First operand 52687 states and 78651 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:28,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:48:28,097 INFO L93 Difference]: Finished difference Result 91980 states and 137494 transitions. [2023-04-02 06:48:28,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 06:48:28,101 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2023-04-02 06:48:28,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:48:28,164 INFO L225 Difference]: With dead ends: 91980 [2023-04-02 06:48:28,165 INFO L226 Difference]: Without dead ends: 39454 [2023-04-02 06:48:28,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:48:28,208 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 86 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:48:28,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 466 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:48:28,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39454 states. [2023-04-02 06:48:31,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39454 to 39033. [2023-04-02 06:48:31,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39033 states, 39029 states have (on average 1.4872018242845064) internal successors, (58044), 39029 states have internal predecessors, (58044), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:31,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39033 states to 39033 states and 58047 transitions. [2023-04-02 06:48:31,408 INFO L78 Accepts]: Start accepts. Automaton has 39033 states and 58047 transitions. Word has length 101 [2023-04-02 06:48:31,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:48:31,408 INFO L495 AbstractCegarLoop]: Abstraction has 39033 states and 58047 transitions. [2023-04-02 06:48:31,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:31,408 INFO L276 IsEmpty]: Start isEmpty. Operand 39033 states and 58047 transitions. [2023-04-02 06:48:31,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-04-02 06:48:31,410 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:48:31,410 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:48:31,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-02 06:48:31,411 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:48:31,411 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:48:31,411 INFO L85 PathProgramCache]: Analyzing trace with hash 168134177, now seen corresponding path program 1 times [2023-04-02 06:48:31,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:48:31,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588553848] [2023-04-02 06:48:31,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:48:31,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:48:31,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:31,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:48:31,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:31,658 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:48:31,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:48:31,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588553848] [2023-04-02 06:48:31,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588553848] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:48:31,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:48:31,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:48:31,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221785517] [2023-04-02 06:48:31,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:48:31,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:48:31,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:48:31,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:48:31,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:48:31,660 INFO L87 Difference]: Start difference. First operand 39033 states and 58047 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:33,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:48:33,486 INFO L93 Difference]: Finished difference Result 52933 states and 78745 transitions. [2023-04-02 06:48:33,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 06:48:33,486 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2023-04-02 06:48:33,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:48:33,506 INFO L225 Difference]: With dead ends: 52933 [2023-04-02 06:48:33,506 INFO L226 Difference]: Without dead ends: 14063 [2023-04-02 06:48:33,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:48:33,533 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 73 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:48:33,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 417 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:48:33,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14063 states. [2023-04-02 06:48:34,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14063 to 13932. [2023-04-02 06:48:34,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13932 states, 13928 states have (on average 1.4789632395175187) internal successors, (20599), 13928 states have internal predecessors, (20599), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:34,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13932 states to 13932 states and 20602 transitions. [2023-04-02 06:48:34,716 INFO L78 Accepts]: Start accepts. Automaton has 13932 states and 20602 transitions. Word has length 101 [2023-04-02 06:48:34,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:48:34,716 INFO L495 AbstractCegarLoop]: Abstraction has 13932 states and 20602 transitions. [2023-04-02 06:48:34,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:34,717 INFO L276 IsEmpty]: Start isEmpty. Operand 13932 states and 20602 transitions. [2023-04-02 06:48:34,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-04-02 06:48:34,718 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:48:34,718 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:48:34,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-02 06:48:34,718 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:48:34,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:48:34,719 INFO L85 PathProgramCache]: Analyzing trace with hash 648274239, now seen corresponding path program 1 times [2023-04-02 06:48:34,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:48:34,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118714873] [2023-04-02 06:48:34,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:48:34,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:48:34,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:34,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:48:34,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:34,943 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:48:34,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:48:34,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118714873] [2023-04-02 06:48:34,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118714873] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:48:34,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:48:34,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:48:34,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061646881] [2023-04-02 06:48:34,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:48:34,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:48:34,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:48:34,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:48:34,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:48:34,945 INFO L87 Difference]: Start difference. First operand 13932 states and 20602 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:35,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:48:35,729 INFO L93 Difference]: Finished difference Result 20351 states and 30105 transitions. [2023-04-02 06:48:35,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 06:48:35,730 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2023-04-02 06:48:35,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:48:35,738 INFO L225 Difference]: With dead ends: 20351 [2023-04-02 06:48:35,738 INFO L226 Difference]: Without dead ends: 6582 [2023-04-02 06:48:35,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:48:35,752 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 60 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:48:35,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 368 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:48:35,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6582 states. [2023-04-02 06:48:36,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6582 to 6568. [2023-04-02 06:48:36,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6568 states, 6564 states have (on average 1.4693784277879343) internal successors, (9645), 6564 states have internal predecessors, (9645), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:36,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6568 states to 6568 states and 9648 transitions. [2023-04-02 06:48:36,382 INFO L78 Accepts]: Start accepts. Automaton has 6568 states and 9648 transitions. Word has length 101 [2023-04-02 06:48:36,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:48:36,383 INFO L495 AbstractCegarLoop]: Abstraction has 6568 states and 9648 transitions. [2023-04-02 06:48:36,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:36,383 INFO L276 IsEmpty]: Start isEmpty. Operand 6568 states and 9648 transitions. [2023-04-02 06:48:36,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-04-02 06:48:36,384 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:48:36,384 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:48:36,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-04-02 06:48:36,384 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:48:36,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:48:36,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1728553634, now seen corresponding path program 1 times [2023-04-02 06:48:36,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:48:36,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20135774] [2023-04-02 06:48:36,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:48:36,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:48:36,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:36,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:48:36,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:36,731 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 06:48:36,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:48:36,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20135774] [2023-04-02 06:48:36,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20135774] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:48:36,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:48:36,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 06:48:36,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594981101] [2023-04-02 06:48:36,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:48:36,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 06:48:36,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:48:36,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 06:48:36,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:48:36,733 INFO L87 Difference]: Start difference. First operand 6568 states and 9648 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:38,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:48:38,870 INFO L93 Difference]: Finished difference Result 21483 states and 31390 transitions. [2023-04-02 06:48:38,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:48:38,870 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2023-04-02 06:48:38,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:48:38,892 INFO L225 Difference]: With dead ends: 21483 [2023-04-02 06:48:38,892 INFO L226 Difference]: Without dead ends: 15117 [2023-04-02 06:48:38,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:48:38,902 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 405 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:48:38,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 580 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:48:38,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15117 states. [2023-04-02 06:48:40,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15117 to 12870. [2023-04-02 06:48:40,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12870 states, 12866 states have (on average 1.4637805067620084) internal successors, (18833), 12866 states have internal predecessors, (18833), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:40,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12870 states to 12870 states and 18836 transitions. [2023-04-02 06:48:40,184 INFO L78 Accepts]: Start accepts. Automaton has 12870 states and 18836 transitions. Word has length 102 [2023-04-02 06:48:40,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:48:40,185 INFO L495 AbstractCegarLoop]: Abstraction has 12870 states and 18836 transitions. [2023-04-02 06:48:40,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:40,185 INFO L276 IsEmpty]: Start isEmpty. Operand 12870 states and 18836 transitions. [2023-04-02 06:48:40,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-04-02 06:48:40,186 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:48:40,186 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:48:40,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-04-02 06:48:40,186 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:48:40,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:48:40,187 INFO L85 PathProgramCache]: Analyzing trace with hash -419798158, now seen corresponding path program 1 times [2023-04-02 06:48:40,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:48:40,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997552939] [2023-04-02 06:48:40,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:48:40,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:48:40,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:40,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:48:40,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:40,540 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 06:48:40,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:48:40,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997552939] [2023-04-02 06:48:40,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997552939] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:48:40,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:48:40,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 06:48:40,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969312123] [2023-04-02 06:48:40,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:48:40,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 06:48:40,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:48:40,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 06:48:40,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:48:40,541 INFO L87 Difference]: Start difference. First operand 12870 states and 18836 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:43,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:48:43,380 INFO L93 Difference]: Finished difference Result 30484 states and 44721 transitions. [2023-04-02 06:48:43,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:48:43,380 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2023-04-02 06:48:43,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:48:43,412 INFO L225 Difference]: With dead ends: 30484 [2023-04-02 06:48:43,412 INFO L226 Difference]: Without dead ends: 21814 [2023-04-02 06:48:43,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:48:43,426 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 375 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:48:43,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 578 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:48:43,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21814 states. [2023-04-02 06:48:45,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21814 to 19506. [2023-04-02 06:48:45,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19506 states, 19502 states have (on average 1.4620551738283254) internal successors, (28513), 19502 states have internal predecessors, (28513), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:45,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19506 states to 19506 states and 28516 transitions. [2023-04-02 06:48:45,594 INFO L78 Accepts]: Start accepts. Automaton has 19506 states and 28516 transitions. Word has length 102 [2023-04-02 06:48:45,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:48:45,594 INFO L495 AbstractCegarLoop]: Abstraction has 19506 states and 28516 transitions. [2023-04-02 06:48:45,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:45,594 INFO L276 IsEmpty]: Start isEmpty. Operand 19506 states and 28516 transitions. [2023-04-02 06:48:45,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-04-02 06:48:45,598 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:48:45,598 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:48:45,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-04-02 06:48:45,598 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:48:45,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:48:45,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1995423906, now seen corresponding path program 1 times [2023-04-02 06:48:45,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:48:45,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060113363] [2023-04-02 06:48:45,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:48:45,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:48:45,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:45,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:48:45,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:45,780 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-02 06:48:45,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:48:45,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060113363] [2023-04-02 06:48:45,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060113363] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:48:45,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:48:45,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:48:45,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001148281] [2023-04-02 06:48:45,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:48:45,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:48:45,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:48:45,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:48:45,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:48:45,783 INFO L87 Difference]: Start difference. First operand 19506 states and 28516 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:48,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:48:48,142 INFO L93 Difference]: Finished difference Result 36950 states and 54114 transitions. [2023-04-02 06:48:48,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 06:48:48,143 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 157 [2023-04-02 06:48:48,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:48:48,167 INFO L225 Difference]: With dead ends: 36950 [2023-04-02 06:48:48,167 INFO L226 Difference]: Without dead ends: 15154 [2023-04-02 06:48:48,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:48:48,191 INFO L413 NwaCegarLoop]: 303 mSDtfsCounter, 99 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:48:48,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 501 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:48:48,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15154 states. [2023-04-02 06:48:49,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15154 to 11802. [2023-04-02 06:48:49,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11802 states, 11798 states have (on average 1.4437192744532972) internal successors, (17033), 11798 states have internal predecessors, (17033), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:49,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11802 states to 11802 states and 17036 transitions. [2023-04-02 06:48:49,647 INFO L78 Accepts]: Start accepts. Automaton has 11802 states and 17036 transitions. Word has length 157 [2023-04-02 06:48:49,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:48:49,647 INFO L495 AbstractCegarLoop]: Abstraction has 11802 states and 17036 transitions. [2023-04-02 06:48:49,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:49,647 INFO L276 IsEmpty]: Start isEmpty. Operand 11802 states and 17036 transitions. [2023-04-02 06:48:49,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-04-02 06:48:49,650 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:48:49,650 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:48:49,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-04-02 06:48:49,650 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:48:49,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:48:49,650 INFO L85 PathProgramCache]: Analyzing trace with hash -147236927, now seen corresponding path program 1 times [2023-04-02 06:48:49,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:48:49,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467006068] [2023-04-02 06:48:49,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:48:49,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:48:49,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:49,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:48:49,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:49,904 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-02 06:48:49,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:48:49,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467006068] [2023-04-02 06:48:49,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467006068] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:48:49,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:48:49,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:48:49,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888826298] [2023-04-02 06:48:49,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:48:49,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:48:49,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:48:49,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:48:49,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:48:49,906 INFO L87 Difference]: Start difference. First operand 11802 states and 17036 transitions. Second operand has 6 states, 6 states have (on average 24.5) internal successors, (147), 5 states have internal predecessors, (147), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:52,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:48:52,539 INFO L93 Difference]: Finished difference Result 24493 states and 35734 transitions. [2023-04-02 06:48:52,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:48:52,541 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.5) internal successors, (147), 5 states have internal predecessors, (147), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 163 [2023-04-02 06:48:52,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:48:52,571 INFO L225 Difference]: With dead ends: 24493 [2023-04-02 06:48:52,572 INFO L226 Difference]: Without dead ends: 17663 [2023-04-02 06:48:52,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:48:52,585 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 496 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:48:52,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 704 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:48:52,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17663 states. [2023-04-02 06:48:54,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17663 to 16981. [2023-04-02 06:48:54,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16981 states, 16977 states have (on average 1.4616245508629322) internal successors, (24814), 16977 states have internal predecessors, (24814), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:54,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16981 states to 16981 states and 24817 transitions. [2023-04-02 06:48:54,660 INFO L78 Accepts]: Start accepts. Automaton has 16981 states and 24817 transitions. Word has length 163 [2023-04-02 06:48:54,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:48:54,660 INFO L495 AbstractCegarLoop]: Abstraction has 16981 states and 24817 transitions. [2023-04-02 06:48:54,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.5) internal successors, (147), 5 states have internal predecessors, (147), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:54,661 INFO L276 IsEmpty]: Start isEmpty. Operand 16981 states and 24817 transitions. [2023-04-02 06:48:54,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-04-02 06:48:54,662 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:48:54,662 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:48:54,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-04-02 06:48:54,663 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:48:54,663 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:48:54,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1250691451, now seen corresponding path program 2 times [2023-04-02 06:48:54,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:48:54,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37334473] [2023-04-02 06:48:54,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:48:54,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:48:54,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:54,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:48:54,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:54,967 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 68 proven. 32 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 06:48:54,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:48:54,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37334473] [2023-04-02 06:48:54,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37334473] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 06:48:54,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680400869] [2023-04-02 06:48:54,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 06:48:54,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 06:48:54,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 06:48:54,970 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 06:48:54,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 06:48:55,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-04-02 06:48:55,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 06:48:55,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 06:48:55,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 06:48:55,337 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-04-02 06:48:55,337 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 06:48:55,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680400869] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:48:55,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 06:48:55,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-04-02 06:48:55,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536528057] [2023-04-02 06:48:55,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:48:55,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:48:55,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:48:55,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:48:55,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:48:55,338 INFO L87 Difference]: Start difference. First operand 16981 states and 24817 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:59,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:48:59,512 INFO L93 Difference]: Finished difference Result 49497 states and 72090 transitions. [2023-04-02 06:48:59,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 06:48:59,513 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 163 [2023-04-02 06:48:59,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:48:59,567 INFO L225 Difference]: With dead ends: 49497 [2023-04-02 06:48:59,567 INFO L226 Difference]: Without dead ends: 32535 [2023-04-02 06:48:59,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-02 06:48:59,592 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 375 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 06:48:59,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 480 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 06:48:59,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32535 states. [2023-04-02 06:49:03,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32535 to 32533. [2023-04-02 06:49:03,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32533 states, 32529 states have (on average 1.4415137262135325) internal successors, (46891), 32529 states have internal predecessors, (46891), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:03,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32533 states to 32533 states and 46894 transitions. [2023-04-02 06:49:03,913 INFO L78 Accepts]: Start accepts. Automaton has 32533 states and 46894 transitions. Word has length 163 [2023-04-02 06:49:03,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:49:03,913 INFO L495 AbstractCegarLoop]: Abstraction has 32533 states and 46894 transitions. [2023-04-02 06:49:03,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:03,913 INFO L276 IsEmpty]: Start isEmpty. Operand 32533 states and 46894 transitions. [2023-04-02 06:49:03,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-04-02 06:49:03,916 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:49:03,916 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:49:03,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 06:49:04,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-04-02 06:49:04,117 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:49:04,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:49:04,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1795769290, now seen corresponding path program 1 times [2023-04-02 06:49:04,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:49:04,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355852644] [2023-04-02 06:49:04,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:49:04,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:49:04,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:49:04,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:49:04,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:49:04,320 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-04-02 06:49:04,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:49:04,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355852644] [2023-04-02 06:49:04,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355852644] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:49:04,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:49:04,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:49:04,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765072648] [2023-04-02 06:49:04,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:49:04,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:49:04,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:49:04,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:49:04,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:49:04,322 INFO L87 Difference]: Start difference. First operand 32533 states and 46894 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:13,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:49:13,771 INFO L93 Difference]: Finished difference Result 97348 states and 140347 transitions. [2023-04-02 06:49:13,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 06:49:13,772 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 164 [2023-04-02 06:49:13,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:49:13,897 INFO L225 Difference]: With dead ends: 97348 [2023-04-02 06:49:13,897 INFO L226 Difference]: Without dead ends: 64973 [2023-04-02 06:49:13,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:49:13,935 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 181 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:49:13,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 411 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:49:13,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64973 states. [2023-04-02 06:49:19,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64973 to 32536. [2023-04-02 06:49:19,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32536 states, 32532 states have (on average 1.441503750153695) internal successors, (46895), 32532 states have internal predecessors, (46895), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:19,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32536 states to 32536 states and 46898 transitions. [2023-04-02 06:49:19,367 INFO L78 Accepts]: Start accepts. Automaton has 32536 states and 46898 transitions. Word has length 164 [2023-04-02 06:49:19,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:49:19,367 INFO L495 AbstractCegarLoop]: Abstraction has 32536 states and 46898 transitions. [2023-04-02 06:49:19,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:19,367 INFO L276 IsEmpty]: Start isEmpty. Operand 32536 states and 46898 transitions. [2023-04-02 06:49:19,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-04-02 06:49:19,370 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:49:19,370 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:49:19,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-04-02 06:49:19,371 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:49:19,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:49:19,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1419082150, now seen corresponding path program 1 times [2023-04-02 06:49:19,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:49:19,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609418978] [2023-04-02 06:49:19,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:49:19,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:49:19,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:49:19,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:49:19,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:49:19,564 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2023-04-02 06:49:19,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:49:19,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609418978] [2023-04-02 06:49:19,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609418978] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:49:19,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:49:19,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:49:19,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800191208] [2023-04-02 06:49:19,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:49:19,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:49:19,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:49:19,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:49:19,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:49:19,565 INFO L87 Difference]: Start difference. First operand 32536 states and 46898 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 3 states have internal predecessors, (105), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:30,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:49:30,082 INFO L93 Difference]: Finished difference Result 95764 states and 137702 transitions. [2023-04-02 06:49:30,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 06:49:30,083 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 3 states have internal predecessors, (105), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 165 [2023-04-02 06:49:30,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:49:30,182 INFO L225 Difference]: With dead ends: 95764 [2023-04-02 06:49:30,182 INFO L226 Difference]: Without dead ends: 63438 [2023-04-02 06:49:30,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:49:30,216 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 139 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:49:30,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 565 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:49:30,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63438 states. [2023-04-02 06:49:40,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63438 to 63436. [2023-04-02 06:49:40,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63436 states, 63432 states have (on average 1.4267877412031782) internal successors, (90504), 63432 states have internal predecessors, (90504), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:40,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63436 states to 63436 states and 90507 transitions. [2023-04-02 06:49:40,443 INFO L78 Accepts]: Start accepts. Automaton has 63436 states and 90507 transitions. Word has length 165 [2023-04-02 06:49:40,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:49:40,443 INFO L495 AbstractCegarLoop]: Abstraction has 63436 states and 90507 transitions. [2023-04-02 06:49:40,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 3 states have internal predecessors, (105), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:40,443 INFO L276 IsEmpty]: Start isEmpty. Operand 63436 states and 90507 transitions. [2023-04-02 06:49:40,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-04-02 06:49:40,449 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:49:40,449 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:49:40,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-04-02 06:49:40,449 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:49:40,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:49:40,449 INFO L85 PathProgramCache]: Analyzing trace with hash -706013847, now seen corresponding path program 1 times [2023-04-02 06:49:40,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:49:40,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203665430] [2023-04-02 06:49:40,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:49:40,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:49:40,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:49:40,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:49:40,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:49:40,720 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 72 proven. 28 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 06:49:40,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:49:40,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203665430] [2023-04-02 06:49:40,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203665430] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 06:49:40,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429109715] [2023-04-02 06:49:40,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:49:40,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 06:49:40,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 06:49:40,722 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 06:49:40,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 06:49:40,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:49:40,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 06:49:40,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 06:49:40,932 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-04-02 06:49:40,932 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 06:49:40,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429109715] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:49:40,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 06:49:40,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-04-02 06:49:40,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750296453] [2023-04-02 06:49:40,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:49:40,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:49:40,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:49:40,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:49:40,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:49:40,934 INFO L87 Difference]: Start difference. First operand 63436 states and 90507 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:51,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:49:51,676 INFO L93 Difference]: Finished difference Result 127012 states and 181190 transitions. [2023-04-02 06:49:51,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 06:49:51,676 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 165 [2023-04-02 06:49:51,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:49:51,795 INFO L225 Difference]: With dead ends: 127012 [2023-04-02 06:49:51,795 INFO L226 Difference]: Without dead ends: 63587 [2023-04-02 06:49:51,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-02 06:49:51,860 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 545 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 06:49:51,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [545 Valid, 412 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 06:49:51,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63587 states. [2023-04-02 06:50:02,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63587 to 63541. [2023-04-02 06:50:02,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63541 states, 63537 states have (on average 1.4264916505343344) internal successors, (90635), 63537 states have internal predecessors, (90635), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:02,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63541 states to 63541 states and 90638 transitions. [2023-04-02 06:50:02,602 INFO L78 Accepts]: Start accepts. Automaton has 63541 states and 90638 transitions. Word has length 165 [2023-04-02 06:50:02,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:50:02,602 INFO L495 AbstractCegarLoop]: Abstraction has 63541 states and 90638 transitions. [2023-04-02 06:50:02,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:02,602 INFO L276 IsEmpty]: Start isEmpty. Operand 63541 states and 90638 transitions. [2023-04-02 06:50:02,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-04-02 06:50:02,607 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:50:02,607 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:50:02,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 06:50:02,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-04-02 06:50:02,808 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:50:02,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:50:02,808 INFO L85 PathProgramCache]: Analyzing trace with hash -2018971024, now seen corresponding path program 1 times [2023-04-02 06:50:02,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:50:02,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740664754] [2023-04-02 06:50:02,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:50:02,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:50:02,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:02,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:50:02,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:02,974 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-04-02 06:50:02,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:50:02,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740664754] [2023-04-02 06:50:02,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740664754] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:50:02,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:50:02,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:50:02,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008813580] [2023-04-02 06:50:02,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:50:02,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:50:02,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:50:02,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:50:02,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:50:02,975 INFO L87 Difference]: Start difference. First operand 63541 states and 90638 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 3 states have internal predecessors, (101), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:25,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:50:25,322 INFO L93 Difference]: Finished difference Result 190487 states and 271740 transitions. [2023-04-02 06:50:25,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 06:50:25,323 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 3 states have internal predecessors, (101), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 166 [2023-04-02 06:50:25,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:50:25,584 INFO L225 Difference]: With dead ends: 190487 [2023-04-02 06:50:25,584 INFO L226 Difference]: Without dead ends: 127067 [2023-04-02 06:50:25,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:50:25,653 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 195 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:50:25,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 435 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:50:25,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127067 states. [2023-04-02 06:50:38,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127067 to 63544. [2023-04-02 06:50:38,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63544 states, 63540 states have (on average 1.4264872521246459) internal successors, (90639), 63540 states have internal predecessors, (90639), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:38,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63544 states to 63544 states and 90642 transitions. [2023-04-02 06:50:38,503 INFO L78 Accepts]: Start accepts. Automaton has 63544 states and 90642 transitions. Word has length 166 [2023-04-02 06:50:38,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:50:38,503 INFO L495 AbstractCegarLoop]: Abstraction has 63544 states and 90642 transitions. [2023-04-02 06:50:38,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 3 states have internal predecessors, (101), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:38,504 INFO L276 IsEmpty]: Start isEmpty. Operand 63544 states and 90642 transitions. [2023-04-02 06:50:38,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-04-02 06:50:38,509 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:50:38,509 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:50:38,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-04-02 06:50:38,510 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:50:38,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:50:38,510 INFO L85 PathProgramCache]: Analyzing trace with hash 2106200648, now seen corresponding path program 1 times [2023-04-02 06:50:38,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:50:38,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358917717] [2023-04-02 06:50:38,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:50:38,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:50:38,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:38,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:50:38,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:38,783 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 68 proven. 32 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 06:50:38,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:50:38,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358917717] [2023-04-02 06:50:38,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358917717] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 06:50:38,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194848669] [2023-04-02 06:50:38,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:50:38,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 06:50:38,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 06:50:38,784 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 06:50:38,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 06:50:38,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:38,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 1062 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 06:50:38,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 06:50:39,025 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-04-02 06:50:39,025 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 06:50:39,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194848669] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:50:39,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 06:50:39,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-04-02 06:50:39,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177500322] [2023-04-02 06:50:39,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:50:39,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:50:39,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:50:39,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:50:39,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:50:39,027 INFO L87 Difference]: Start difference. First operand 63544 states and 90642 transitions. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:51,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:50:51,888 INFO L93 Difference]: Finished difference Result 127374 states and 181614 transitions. [2023-04-02 06:50:51,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 06:50:51,888 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 167 [2023-04-02 06:50:51,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:50:51,996 INFO L225 Difference]: With dead ends: 127374 [2023-04-02 06:50:51,996 INFO L226 Difference]: Without dead ends: 63790 [2023-04-02 06:50:52,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-02 06:50:52,058 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 430 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 06:50:52,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [430 Valid, 436 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 06:50:52,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63790 states. [2023-04-02 06:51:04,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63790 to 63788. [2023-04-02 06:51:04,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63788 states, 63784 states have (on average 1.4127210585726828) internal successors, (90109), 63784 states have internal predecessors, (90109), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:51:04,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63788 states to 63788 states and 90112 transitions. [2023-04-02 06:51:04,985 INFO L78 Accepts]: Start accepts. Automaton has 63788 states and 90112 transitions. Word has length 167 [2023-04-02 06:51:04,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:51:04,985 INFO L495 AbstractCegarLoop]: Abstraction has 63788 states and 90112 transitions. [2023-04-02 06:51:04,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:51:04,985 INFO L276 IsEmpty]: Start isEmpty. Operand 63788 states and 90112 transitions. [2023-04-02 06:51:04,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-04-02 06:51:04,991 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:51:04,991 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:51:04,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-02 06:51:05,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 06:51:05,193 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:51:05,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:51:05,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1407215802, now seen corresponding path program 1 times [2023-04-02 06:51:05,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:51:05,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018319230] [2023-04-02 06:51:05,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:51:05,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:51:05,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:05,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:51:05,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:05,361 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-04-02 06:51:05,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:51:05,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018319230] [2023-04-02 06:51:05,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018319230] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:51:05,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:51:05,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:51:05,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875177063] [2023-04-02 06:51:05,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:51:05,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:51:05,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:51:05,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:51:05,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:51:05,363 INFO L87 Difference]: Start difference. First operand 63788 states and 90112 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 3 states have internal predecessors, (103), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:51:31,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:51:31,328 INFO L93 Difference]: Finished difference Result 190918 states and 269738 transitions. [2023-04-02 06:51:31,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 06:51:31,328 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 3 states have internal predecessors, (103), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 168 [2023-04-02 06:51:31,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:51:31,576 INFO L225 Difference]: With dead ends: 190918 [2023-04-02 06:51:31,576 INFO L226 Difference]: Without dead ends: 127473 [2023-04-02 06:51:31,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:51:31,652 INFO L413 NwaCegarLoop]: 372 mSDtfsCounter, 167 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:51:31,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 574 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:51:31,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127473 states. [2023-04-02 06:51:45,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127473 to 63800. [2023-04-02 06:51:45,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63800 states, 63796 states have (on average 1.4126434259201204) internal successors, (90121), 63796 states have internal predecessors, (90121), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:51:45,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63800 states to 63800 states and 90124 transitions. [2023-04-02 06:51:45,772 INFO L78 Accepts]: Start accepts. Automaton has 63800 states and 90124 transitions. Word has length 168 [2023-04-02 06:51:45,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:51:45,772 INFO L495 AbstractCegarLoop]: Abstraction has 63800 states and 90124 transitions. [2023-04-02 06:51:45,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 3 states have internal predecessors, (103), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:51:45,772 INFO L276 IsEmpty]: Start isEmpty. Operand 63800 states and 90124 transitions. [2023-04-02 06:51:45,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-04-02 06:51:45,778 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:51:45,778 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:51:45,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-04-02 06:51:45,778 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:51:45,779 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:51:45,779 INFO L85 PathProgramCache]: Analyzing trace with hash -755009545, now seen corresponding path program 1 times [2023-04-02 06:51:45,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:51:45,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16872908] [2023-04-02 06:51:45,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:51:45,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:51:45,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:45,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:51:45,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:45,954 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2023-04-02 06:51:45,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:51:45,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16872908] [2023-04-02 06:51:45,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16872908] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:51:45,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:51:45,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:51:45,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079226654] [2023-04-02 06:51:45,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:51:45,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:51:45,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:51:45,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:51:45,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:51:45,955 INFO L87 Difference]: Start difference. First operand 63800 states and 90124 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)